Lubricant dispensing device



Sept. 1, 1931. w. s. TABER LUBRICANT DISPENSING DEVICE Filed Aug. '7,1929 I INVENTOR We Z #:757515 xxx ' W. a .W 2 9 8 9 0 h 1. A 7 a l 3Ill. 5 M ill 0 e 5 ll 7 2 3 f O M 8 7 E I o 4 w a 1 2 6 7 rd :L a M Z 22/ z 7 A a 4, l I r i 8 1 "bx/ l a a Z 1 7 2 ll v u a Q, J M a o v u w wa 1 z ATTORNEY Patented Sept. 1; 193i WAIzTER: szmannm on HON UQ OF HWAII" ammonia msrsnsme. jjEvIcE.

Application fi eaeu usw, 1929. se iar ro ssezzs: 1

(GRANTED unnnn rnnacr orivmRcH 3, 1883,: As AMENDED arm-ren mes; 37.00.s. 7.57): f

This inventiondescribed herein may be manufacturedand used by or for theGovernment: for Igovernmental purposes, With-. out the payment to me ofany royaltyithere;

. on. p

5 This invention relates to a force feed. lu-

bricant dispensing device and more particularly itis directed to thatclass of devices 1 commonly called grease guns inwhich a lubricant suchas grea'se-may be forcibly injected into the bearings, grease cups, andbetween contacting, movable, or Wearing'parts of automobile mechanismsarid the like.

. One object of my invention is to provide a lubricant dispensing devicewhich is. so A constructed that it can be quickly and easily immediatelyavailable for use! Anotherobjectofmy invention isto profilled' with the"lubricant and which be" r vide a lubricant dispensing device With means.for produclng either high or low;

degree of pressure on the lubricant to force it into the desiredplaces'vvithout' disconnect 'ingthemea'nsfor producing the loW- pres- 5sure from the high pressuremeansif 1 Another object ofmy invention isto-providea lubricant; dispensing device with a mechanism for causingthe lubricant to be under a much greater. pressure than ,that'of thepower .niSIIL,

"Still" anotherobject off my invention is to provide a lubricantdispensing device that is simple, compact, durable, eiiicient,satisfactory; and which has. sufiicient'power to force the lubricantWherever found. desirable.

In the usual type ofgrease gunsnovvem-i ployed having means for puttingthe lubricant contained in such devices under either on the places, towhich the lubricant is to be applied it is'fnecessary to disconnect themeans for putting the lubricant under a V -duri'ng; operation ot thedispensing device.

high degree of pressure before the meansemployed for putting thelubrlcant under a-low degree of pressuremay be used. or vice versa thusmaking themanufacture of the W grease guns expensive to construct, andmaking the devices. d fficult to. operateycomplr in service, and whicheliminates the' loss. of

characters and. in; which:

- 1? shows a side elevation 015 a. lub o5 .catlhg device illustrative oithe invention,

partly in'sejctiony required to operate the -mecha.

'in anupnight; position. .Atthebase'? ffthe P 3 11: chamber L aconventional outlet. nipahigh or low degree ofpressure depending .closedby; aremovable head 11 inwhich is cated and of insuflicient power to.force the into" places diflicult to) penetrate. It 1's:thereforetheaimand purpose of: this invention to devise; a lubrica i g dispenS lgdevice vvhiehgis; cheap to construct, easy, to operate efiicient in use,accurate, and rapid t ea resetti g the: gear connections used .11someot-the olderforms; ozE this type i 1. vicez. order that, myinventioni may, be read 1I-yundersto0d,. reference is h dto he -Q.-

companyingj drawi gs. which. corre pond.-

ing parts are-indicatedby the same reference lfiig; 2'isa'longitudmalsectionz ofi the same, Big- 331s atop; plan view oftheinvention' v HP V. In the: illustrative; embod ment of this a vention1 indicates a piston chamber in whichit epi t r2 05f? suitabl constructin is reciprocallys-mevw; by m an of: a s ew threaded piston rod Thegrooves. 4

. e .formed; inthe; wall, of, thech'amber I prevent ;rotation. o f't-hei pi ton during: its! longitufdinal travel; within; the chamber.. Acentrally: locate,d opening; 5 is formed; in; the

closed-lower end oivchamber l whiclr pro- =vides-a bearingfor theIfeduced'endfiofi-the iston rod? A beset is. suitably I attached to the;chamber 1 which provides a: Support fon-theidevice when. it is; desireditastand, it

'ple 8 isshovvn for" customary connection, to a flexible conduit 9'having a. nozzle" 10. at-

. tach'edgto" its free end.

The upper end of the piston chamber l is go The upperend' of the piston.rod 3; extends through said thrust bearing 12 and head; 11 to form' adriving connection with a gear.

l 3 having multiple threads 14 which, engage the multipleathreads' l5=ofthednivingwqrm An operating'crankI'Zis attachedto turning of gears'22and 23 and pinion 2 f. A. threadedrod 25 positioned in a suitablehousing 26 is connected to the pinion 24 and adapted to rotate with thesaid pinion 2% said rod being provided with a collar or sleeve 27 towhich is attached a pointer 28. Upon the the rod 25 the sleeve is movedlongitudinally thereon carrying the pointer 28 with it, thus indicatingon a scale 29 the amount of lubricant which has been dispensed.. Forprotecting the operator from contact with thegearing, yoke members 30and guard member 31 are provided, the ends 32' of said yoke membersproviding bearings for'the multiple threaded worm 16, the guard member31 is positioned around the pinion 24: being attached to chamber lby anysuitable means such as screws 33. Suitable handles 34L are provided onthe device to, make, itportable. In order to lock the piston8 in anygiven position, a detachable worm locking pin 35 is provided whichcooperates with the worm and gear mechani m w 1" Itiis readily seenthatthepist'on 2 may be driven to dispense lubricant at low pressurethrough the flexible conduit 9 by means of the directly connected crank19, The

\ pitch of the multiple threads on members 13 "and '16 being suflicientto enable the member 13 to turn-the member 16 which would not be{tliec'ase if the multiple threads did not have enough-pitch. On theother hand if a high pressureis desired'in conduit?) it may be attainedby applying a small degree of power to the high power crank 17, thepower being multiplied by means ofthe gear wormmembers 13 and 16respectively. This glves a hlgh mechanical advantage and acco-rdinglyahigh pressure in the compression chamber 1 ,to whichconduit 9 is .at-

i itaclied ,It will be apparent thatthe present in- QVention broadlycomprises a lubricant dispensing device in which a piston isoperfiated'by a" screw threaded piston rod said red being operated by aplurality of independently operable drivingmeans, one'of whichdriving'means is directly connected to said screw threaded piston rodand another -of; which is connected with said piston rod through amultiple threaded "gearing, the

threads of said gearing having sufficient therefrom, a'.

and

pitch to make the action of said gearing reversibleupon the operation ofsaid directly connected driving means, and more particularly incombination with means for locking said threaded gearing and with anindicator mechanism operable in synchronism with said piston rod.

Having thus described my invention what I claim as new and desire tosecure by Letters Patent is: Y

1. In a mechanism of thekind described, the combination of a head, ascrew threaded shaft journalled in said head and having one end thereofsquared and projecting worm-wheel "non-rotatably mounted on said shaft,a second shaft having one end thereof squared and a worm mounted thereonmeshing with said wormwheel, a piston having an internally threadedaperture therein meshing with the threads on said screw threaded shaft,and means for turning the squared ends of said shafts to actuate saidworm-wheel' on said screw threaded shaft to cause the said piston totravelon said screw threaded shaft.

2. In a mechanism of the kind described, the combination of a head, vascrew threaded shaft journalled at one end in saidhead, a piston havingan internally threaded aperture therein meshing with the threads of saidscrew threaded shaft and a plurality of driving meansfor turning saidshaft to cause the said piston to travel on said screw threaded shaft,one of which driving means is directly connected to said shaft andanother of which is connected to said shaft through reversible gearing.

3. In a mechanism of the kind described, the combination ofa head, ascrew threaded shaft jonrnalled at one end in said head. a piston havingan internally threaded aperture therein meshing with the threads of saidscrew threaded shaft and a plurality of driving means for rotating saidshaft to cause the said piston to travel on said shaft, one ofwhich'driving means is directly connected to said shaft andlanother ofwhich is connected to said shaft through worm gearing having threads ofsufficient pitch to make.

threaded shaft, one of said driving means connecteddirectly to saidshaft and another connected to said shaft through a worm and worm-wheel,said worm and worm-wheel having threads of sufiicient pltch to causereversible actlon of sald worm upon the op- 7 eration of said directlyconnected driving means. a

5. In a inechanisnrof the kind described, the combination of a head, ascrew threaded shaft journa-lled at one end in said head, a a

I piston having an internally threaded aperture therein meshing'with thethreads of said screw threaded shaft and high and low speed drivingmeans for rotating said shaft to cause the said piston to travel on saidscrew threaded shaft, said high speed driving means being directlyconnected to said shaft and said. low speed driving means including aWorm-Wheel and worm, the said wormwheel being integral and rotatablewith said shaft and said worm in permanentengage ment with saidworm-wheel for rotating said Worm-wheel and shaft for causing the saidpiston to travel on said screw threaded shaft and operate said directlyconnected driving means, the threads on said worm-wheel and worm havingsufficient pitch to cause reversi ble action 0 of said high speeddriving means.

WALTER S. TABER.

said worm upon the operation

